Hydromorphone and Oxymorphone are completely different and unique from both each other and any other pain medication. Though they are both derivatives of
Morphine, it is a completely different drug that will often work perfect for a patient where Morphine didn't work at all. So the "Morphone" part of the names means they are molecularly similar to morphine. The other part of the word (Hydro and Oxy) have nothing whatsoever to do with
Oxycodone or
Hydrocodone. Instead, these prefixes refer to the way the medication is synthesized. Both these medications are extremely powerful (around 6-10 times more potent than Morphine on a Milligram per Milligram bases) and are used most often in post-operation patients. Chronic Pain sufferers will sometimes be put on one of these medications in the form of a time-release pill, but generally only if all other options have been exhausted (OxyContin [OxyCodone], MSContin [Morphine],
Duragesic [Fentanyl], and Dolophine [Methadone])
Hope that helps. Take care.